The fact that the magnetic field generates a force perpendicular to the instantaneous velocity of the particle has implications for the work that the field does on the particle. As a consequence

Question:

The fact that the magnetic field generates a force perpendicular to the instantaneous velocity of the particle has implications for the work that the field does on the particle. As a consequence, if only the magnetic field acts on the particle, its kinetic energy will .

__ increase over time

__ decrease over time

__ remain constant

__ oscillate

Remain constant

Explanation:

By the formula of work done,

Change in kinetic energy = Work done

final kinetic energy - initial kinetic energy = Force × distance × cosθ

final kinetic energy - initial kinetic energy = Force × velocity × time × cosθ

∵ θ = 90 degree

cos 90 = 0

final kinetic energy - initial kinetic energy = 0

final kinetic energy = initial kinetic energy